what's going on with specs?


I'm having a hard time buying a power amp. I'm in the 5-10k range and whae I'm finding are things like PS Audio BHK 250. Specs show 250@8ohms and 500@4ohms. Then the Parasound JC5 shows 400@8ohms and 600@4ohms. Looks like PS Audio doubles at 4 ohms which makes me think it's a stronger amp until I notice the PS Audio spec is at 1 kilohertz and the Parasound measures 20 to 20 kilohertz. That is very confusing and I don't understand why PS Audio doesn't give full power measurements. Anyone with knowledge of these two brands or others. I have the Elac Vela 409s to drive. 
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Paul writes a daily blog / email - ask him. He is BTW an engineer w good ears. He does respond to inquiry.
Pay attention to what many do not publish.
Current & Capacitance?  Sometimes you have to call. Not sure what you mean by strong but if you want resiliance during demanding transients then capacitance is your friend. Also, the actual details of the power supply(VA). Numbers matter, but only a little bit. Watts rarely are the tale of the tape. 
Now you've done it miller. Equated being an audiophile with religion. and that's anathema. Get it? Ha ah. No doubt that say the JC5, BHK 250, Bryston 4BCubed will all sound great. All priced near each other and listening to them at different stores will not help. This may be wrong but it seems to me the more expensive amps $20,000 and up all seem to double power from 8 to 4 ohms. Other measurements could go either way like distortion on less expensive amps can show better than more expensive ones so i agree specs are not everything. But that doesn't mean they mean nothing right? There is some reason a Boulder amp is going to sound better than a Sony receiver and it must show in some measurements. Those are the three I'm looking at and was wondering if anyone had any experience with them or should flip a coin. Oh and the Anthem STR is another contender in that price range. Any knowledge would be appreciated. 
It looks like the BHK 250 has more distortion 20 - 20 k than the Parasound whether it's audible  I have no idea. Of the 4 you mention paired with the Elac I doubt you could hear a difference, the BHK perhaps since it has tubes tossed in probably why it has more distortion.